I am not sure what a good total would be for scamming - I guess it depends on whether or not you get caught or have a good name to protect. That is a lot of dollars / BTC so I hope that they are genuine. It is better to lose your investment to genuine people who could not get it all to work than to lose it to scammers.

Did someone hear some news about minexcoin yet. They where supposed to launch officially on may 22nd.
I contacted support but no reaction till now.
This is the last I have seen about them: https://blog.minecoin.org/